A dataset provided by the European Space Agency

Name: Pulse Phase Resolved Spectroscopy of 4U 1626-67 during the spin-up era
Published: 2016-10-16T22:00:00Z

Proposal ID	076486
Title	Pulse Phase Resolved Spectroscopy of 4U 1626-67 during the spin-up era
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0764860101
DOI	https://doi.org/10.5270/esa-fyr2xuw
Principal Investigator, PI	Prof Biswajit Paul
Abstract	We propose 50ks observation of an accretion powered pulsar 4U 1626-67. Theprimary purpose is to study the variability of the emission lines as a functionof pulse phase during the current spin-up era. Our pulse phase resolvedspectroscopy of previous XMM-Newton observation during spin-down era revealedpulse phase dependence of the O-VII line at 0.568 keV by factor of ~4. Weinterpret that these variations are due to warps in the inner accretion discinduced by radiation pressure which is also believed to be the cause forspin-down. It is expected to show different line variability pattern during thespin-up phase which we aim to study. We will also do time resolved spectroscopyto study the behaviour of these low energy emission lines during the flares
Publications	Changes in the pulse phase dependence of X-ray emission lines in 4U 1626-67 with a torque reversal \|Beri Aru Paul Biswajit \| MNRAS \| 475-999 \| 2018 \| 2018MNRAS.475..999B \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.475..999B Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Energy dependence of quasi-periodic oscillations in accreting X-ray pulsars \|Manikantan Hemanth Paul Biswajit et al. \| MNRAS \| 531-530 \| 2024 \| 2024MNRAS.531..530M \| http://ui.adsabs.harvard.edu/#abs/2024MNRAS.531..530M From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez Antonio C. \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2015-10-05T15:34:04Z/2015-10-06T07:47:24Z
Version	17.56_20190403_1200
Mission Description	The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2016-10-16T22:00:00Z
Last Update	2025-01-27
Keywords	"emission lines", "4u 1626", "xmm newton", "XMM-Newton", "line variability pattern", "pulse phase", "time resolved spectroscopy", "radiation pressure", "XMM", "568 kev", "vii line"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Biswajit Paul, 2016, 'Pulse Phase Resolved Spectroscopy of 4U 1626-67 during the spin-up era', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fyr2xuw